Want to make the easiest DIY all-natural body scrub soap at home? All you have to do is cut up a bar or two of 100 percent natural glycerin soap and melt it in a microwave-safe bowl or cup for about a minute. Stir in a few tablespoons of natural exfoliates like coffee grinds or beach sand. Pour the mixture into a mold (a clean juice or milk container works well) and allow it to set. Voila! You've made your own body scrub!